Resource exhaustion in Openclaw
CVE-2026-35633
OpenClaw before 2026.3.22 contains an unbounded memory allocation vulnerability in remote media HTTP error handling that allows attackers to trigger excessive memory consumption. Attackers can send crafted HTTP error responses with large bodies to remote media endpoints, causing the application to allocate unbounded memory before failure handling occurs.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (49.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003
Affected products
- Openclaw — versions 0, 2026.3.22
Weakness classification (CWE)
References
- github.com/openclaw/openclaw/security/advisories/GHSA-4qwc-c7g9-4xcw (vendor-advisory, Vendor Advisory, third-party-advisory)
- github.com/openclaw/openclaw/commit/630f1479c44f78484dfa21bb407cbe6f171dac87 (Patch, patch)
- github.com/openclaw/openclaw/commit/81445a901091a5d27ef0b56fceedbe4724566438 (Patch, patch)
- www.vulncheck.com/advisories/openclaw-unbounded-memory-allocation-via-remote-me… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-35633?
- CVE-2026-35633 is a medium-severity vulnerability in Openclaw, classified under CWE-789. CVSS score: 5.3/10. Published 2026-04-09.
- How severe is CVE-2026-35633?
- Medium severity. CVSS v3 base score is 5.3 out of 10.